Black Widow Capabilities
Actually, it's not as bad at all that. While I usually practice with the little gun at seven yards (the range I shoot at has 7-10-15-25 yard pistol lanes), last weekend the only line free was at the 25 yard range. I didn't mind, since I intended to primarily shoot my Kimber and Ruger Old Army, but just for the heck of it decided to see if I could hit the paper with the Black Widow at that range. (Paper in this case being half a sheet of poster board, hung portrait rather than landscape. It's just a little larger than the center of mass of an adult male.)
To my surprise, with the .22lr cylinder loaded with Remington Golden Bullet 36 grain HPs (not the cheapest, but on the low-end of the price scale), I was able to maintain about a 12 to 14 inch "group" at that range. Considering that it was a pretty windy day, I don't think that's too bad. It certainly indicates to me that the Black Widow has sufficient defensive accuracy at 25 or 30 feet.
Unfortunately, I can't say the same about its stopping power. But, IF the 50 grain Gold Dots would really expand, it ought to have about the same effect as a .32 fmj. Not great, but hopefully enough to make an attacker decide to seek prey elsewhere.